Laser Ultrasound Flexible System for Non-contact Inspection of Medium Size and Complex Shaped Composite Structures Made of Carbon Fiber Reinforced Polymer

Vandenrijt, Jean-François; Languy, Fabian; Thizy, Cédric; Georges, Marc

doi:10.3390/icem18-05377

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…An alternative method would be to use a laser ultrasound generation method. This method has been shown to work and achieve reasonable results in carbon fibre composites, but no such studies investigating glass fibre composites were found by the authors [49,50]. This method would enable eroded specimens to be analysed without immersion inside a tank, but importantly the laser impulse on the surface could affect the material properties of any particularly temperature sensitive materials, such as those discussed previously.…”

Section: Ultrasoundmentioning

confidence: 99%

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On analytical tools for assessing the raindrop erosion of wind turbine blades

Pugh

Nash

Reaburn

et al. 2021

Renewable and Sustainable Energy Reviews

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Section: Ultrasoundmentioning

confidence: 99%

“…One of the main concerns surrounding Ultrasound and its use in testing composite components is due to the high attenuation, caused by scattering from the fibres [52]. It can also be difficult distinguishing between the initial impulse and reflections caused by defects in thin samples [49].…”

Section: Ultrasoundmentioning

confidence: 99%

On analytical tools for assessing the raindrop erosion of wind turbine blades

Pugh

Nash

Reaburn

et al. 2021

Renewable and Sustainable Energy Reviews

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“…10,18,19 These all-optical photoacoustic NDT systems can detect curved surfaces and are immune to electromagnetic interference. [20][21][22] However, the use of laser ablation to generate or detect ultrasonic waves in these systems may cause thermal damage to the monitored target. [22][23][24] Integrated excitation and detection FUTs based on the thermoelastic effect are primarily used in high-resolution medical imaging, but their detection range is limited.…”

Section: Introductionmentioning

confidence: 99%

All-fiber photoacoustic system for large-area nondestructive testing

Wu,

Fu,

et al. 2023

Structural Health Monitoring

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Nondestructive testing (NDT) is of paramount importance in ensuring the safe operation of equipment. Among various NDT techniques, ultrasonic NDT has garnered widespread attention due to its high sensitivity, fast speed, and accurate defect location. Photoacoustic NDT, a burgeoning field in ultrasonic NDT, is particularly attractive due to its immunity to electromagnetic interference. However, existing photoacoustic NDT systems suffer from inadequate excitation intensity and complex ultrasonic signal characteristics, impeding large-area NDT and accurate crack visualization. In this study, we present an all-fiber photoacoustic system for large-area NDT. To address the issues, we have developed a photoacoustic generator unit that can be optimized and controlled to generate stronger ultrasonic signals. Furthermore, we have employed mode decomposition to simplify the detected ultrasonic signals by mitigating the acoustic impedance mismatch-induced mode mixing problem in the system. As a result, the technology allows for large-area crack monitoring of up to 50*50 cm2 with an improved resolution of 1 mm. The present technology paves the way for high-resolution equipment crack monitoring with substantially enhanced accuracy in various environments.

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Laser-Excited Acoustics for Contact-Free Inspection of Aerospace Composites

Brauns¹,

Lücking²,

Fischer³

et al. 2021

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Ultrasonic testing (UT) is widely used for the nondestructive testing (NDT) of composite materials in the aerospace industry. Liquid-coupled piezoelectric ultrasonic transducers are the most common technology used in this field; however, liquid coupling agents are not always practical, economical, or compatible with materials that cannot get wet. Alternative couplant-free technologies such as air-coupled ultrasound or laser ultrasound (LUS) are available, but either lack the required sensitivity and resolution, or are very costly, large, and sensitive to surface condition and properties. In this paper, we introduce a new couplant-free approach using laser excitation and a commercially available optical micro-phone. This technique is termed laser-excited acoustics (LEA) NDT, which combines the advantages of a contact-free ultrasound technology with the potential for improved sensitivity and resolution required for NDT in industrial environments. We will demonstrate the capabilities of LEA on aerospace composite parts made of carbon and glass fiber–reinforced polymer (CFRP/GFRP) under realistic conditions.

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Laser Ultrasound Flexible System for Non-contact Inspection of Medium Size and Complex Shaped Composite Structures Made of Carbon Fiber Reinforced Polymer

Cited by 4 publications

References 13 publications

On analytical tools for assessing the raindrop erosion of wind turbine blades

On analytical tools for assessing the raindrop erosion of wind turbine blades

All-fiber photoacoustic system for large-area nondestructive testing

Laser-Excited Acoustics for Contact-Free Inspection of Aerospace Composites

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